Relative contribution of body composition to bone mineral density at different sites in men and women of South Korea |
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Authors: | Lian-Hua Cui Min-Ho Shin Sun-Seog Kweon Kyeong-Soo Park Young-Hoon Lee Eun-Kyung Chung Hae-Sung Nam Jin-Su Choi |
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Institution: | (1) Department of Preventive Medicine, Chonnam National University Medical School, 5, Hak 1-dong, Dong-gu, Gwangju, 501-746, South Korea;(2) Department of Preventive Medicine, College of Medicine, Seonam University, Namwon, South Korea;(3) Department of Preventive Medicine, Qingdao University Medical College, Qingdao, China;(4) Department of Medical Education, Chonnam National University Medical School, Gwangju, South Korea;(5) Department of Preventive Medicine, College of Medicine, Chungnam National University, Daejeon, South Korea |
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Abstract: | We examined the relative contribution of body composition to bone mineral density (BMD) at various sites in 1406 Korean rural
men and women, aged 19–80 years, from July to August 2004. The BMD was measured at peripheral (distal forearm and calcaneus)
and central (lumbar spine at L1–L4, femoral neck, trochanter, and Ward's triangle) using dual-energy X-ray absorptiometry.
In multivariate analyses, the linear regression models were adjusted for relevant covariates. In premenopausal women, only
lean mass had a significant positive correlation with BMD at all sites. In postmenopausal women, fat mass was significantly
positively correlated with BMD at all sites, except the Ward's triangle; fat mass was the only determinant of BMD at the lumbar,
distal forearm, and calcaneus sites, whereas both lean and fat mass contributed to BMD at the hip, with the effect of lean
mass being slightly greater than that of fat mass. In younger men, lean mass had a significant positive contribution to BMD
at all sites, whereas fat mass appeared to contribute negatively to BMD at all sites, except the calcaneus. In older men,
lean mass made a significant positive contribution to the BMD at all sites; fat mass also made a significant positive contribution
to the BMD at the forearm and calcaneus. These data indicate that in the Korean rural population, lean mass may be an important
determinant of the BMD, whereas fat mass may contribute positively to BMD only in postmenopausal women and older men. |
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Keywords: | bone mineral density body composition men and women |
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